Question

the sun rise two hours earlier in Arunachal Pradesh as compared to Gujarat in the west but the watches show the same time how does this happen​

Answer 1

The longitudinal gap between Arunachal Pradesh and Gujarat is about 30°. Since Arunachal Pradesh is in the east, the sun rises earlier here compared to Gujarat. The Indian Standard Time is taken from the time of Standard Meridian of India and hence, the watches show the same time in both the states.